Index: sources/gui/qml/components/RangeSlider.qml
===================================================================
diff -u -r99e12314855a6b8dd46989b9c0e5263b74af5dc4 -rd0ae5a039ca37630c0911e1f9041b93b980e0431
--- sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision 99e12314855a6b8dd46989b9c0e5263b74af5dc4)
+++ sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision d0ae5a039ca37630c0911e1f9041b93b980e0431)
@@ -40,6 +40,13 @@
     property alias  minValue    : _rangeRect.lowerBound             ///< value of the minimum slider handler
     property alias  maxValue    : _rangeRect.upperBound             ///< value of the maximum slider handler
 
+    property int    gapValue    : 0                                 ///< the gap between minValue and maxValue so the minValue shall always be gap value less than maxValue and vise versa.
+    property real   minValueLowerBound    : _root.minimum           ///< min value can't be lower  than this value
+    property real   minValueUpperBound    : _root.maximum           ///< min value can't be higher than this value
+    property real   maxValueLowerBound    : _root.minimum           ///< max value can't be lower  than this value
+    property real   maxValueUpperBound    : _root.maximum           ///< max value can't be higher than this value
+
+
     property int    curHandler  : RangeSlider.HandlerOption.None    ///< current active slider handler
     property int    diameter    : Variables.progressbarHandler      ///< handlers diameter
 
@@ -133,26 +140,48 @@
     /// \param      x : mouse x position.
     function setBound(x) {
         var value = setValue(x)
+        console.debug( maxValue - minValue, minValue, value, maxValue )
+        if ( maxValue - minValue <= gapValue ) {
+            // max correction if the values get too close together less than defined gap
+            if ( curHandler === RangeSlider.HandlerOption.Max ) {
+                maxValue = minValue + gapValue
+            }
+            // min correction if the values get too close together less than defined gap
+            if ( curHandler === RangeSlider.HandlerOption.Min ) {
+                minValue = maxValue - gapValue
+            }
+            // while value is between min and max do nothing and let the value gets out of the bound and then apply value.
+            if ( minValue <= value && value <= maxValue ) {
+                return
+            }
+        }
 
         var minDiff = Math.abs(minValue - value)
         var maxDiff = Math.abs(maxValue - value)
-
-        if (minDiff === maxDiff) {
-            if (curHandler === RangeSlider.HandlerOption.Max) {
+        if ( minDiff === maxDiff ) {
+            if ( curHandler === RangeSlider.HandlerOption.Max ) {
+                if ( value < maxValueLowerBound ) return
+                if ( value > maxValueUpperBound ) return
                 maxValue = value
             }
             else {
                 curHandler = RangeSlider.HandlerOption.Min
+                if ( value < minValueLowerBound ) return
+                if ( value > minValueUpperBound ) return
                 minValue = value
             }
         }
         else {
-            if (minDiff < maxDiff) {
+            if ( minDiff < maxDiff ) {
                 curHandler = RangeSlider.HandlerOption.Min
+                if ( value < minValueLowerBound ) return
+                if ( value > minValueUpperBound ) return
                 minValue = value
             }
             else {
                 curHandler = RangeSlider.HandlerOption.Max
+                if ( value < maxValueLowerBound ) return
+                if ( value > maxValueUpperBound ) return
                 maxValue = value
             }
         }